lost its greatest son >> now at 7:00, the world mourns the passing of nelson mandela, a look back a at his visit that brought people together. >> and the entire bay area, a freeze warning and rain on the way. >> and one neighborhood on alert. eight homes burglaried in a matter of weeks. the common thread police found in each case. . >>> bay area braces for another night with temperatures in the teens in some cases. good evening, i'm gasia mikaelian. parts of the bay area that includes record lows. martin will tell us if rain will be coming in the picture. drivers are warned of dangerously slick roads. and in walnut creek, there was some black ice. >> freezing temperatures at the height of the morning commute turned the road to ice. >> my wife hit black ice. >> fortunately, dennis stack is a professional driving instructor. >> she did what she was supposed to do, off the gas, off the brake. she was scared but through it in seconds. >> many unprotected plants in the did i ablow -- diablo valley. luckier ones like these were covered. hard frost alerted this salon owner lisa skinner.